hacktoberfest web-worker xhr HTML JavaScript PHP speedtest html5-speedtest internet-speed-checker librespeed internet-speed
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Self-hosted Speedtest for HTML5 and more. Easy setup, examples, configurable, mobile friendly. Supports PHP, Node, Multiple servers, and more

5.1K Stars 1.2K Forks GNU Lesser General Public License v3.0 219 Commits 23 Opened issues

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LibreSpeed Logo


No Flash, No Java, No Websocket, No Bullshit.

This is a very lightweight Speedtest implemented in Javascript, using XMLHttpRequest and Web Workers.

Try it

Take a Speedtest


All modern browsers are supported: IE11, latest Edge, latest Chrome, latest Firefox, latest Safari.
Works with mobile versions too.


  • Download
  • Upload
  • Ping
  • Jitter
  • IP Address, ISP, distance from server (optional)
  • Telemetry (optional)
  • Results sharing (optional)
  • Multiple Points of Test (optional)


Server requirements

  • A reasonably fast web server with Apache 2 (nginx, IIS also supported)
  • PHP 5.4 (other backends also available)
  • MySQL database to store test results (optional, PostgreSQL and SQLite also supported)
  • A fast! internet connection

Installation videos

Android app

A template to build an Android client for your LibreSpeed installation is available here.


Please see the


Go backend

A Go implementation is available in the

repo, maintained by Maddie Zhan.

Node.js backend

A partial Node.js implementation is available in the

branch, developed by dunklesToast. It's not recommended to use at the moment.


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Copyright (C) 2016-2020 Federico Dossena

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this program. If not, see https://www.gnu.org/licenses/lgpl.

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